Level 3 Screening Process
Draft Alternatives Analysis for Rehabilitation or Replacement of the Tappan Zee Bridge Report,
September 2008
Executive Summary (PDF, 1.6 MB)
Table of Contents (PDF, 111 KB)
1. Introduction (PDF, 25 KB)
Project Overview
Purpose of Report
Evaluation Process
2. Engineering Elements (PDF, 436 KB)
Introduction
Purpose & Need
Operating Criteria and Design Requirements
Condition & Assessment of Existing TZB
Work Required to Rehabilitate Existing TZB
Rehabilitation and Replacement Options
3. TZB Rehabilitation Options (PDF, 915 KB)
Introduction
Rehabilitation Option 1
Rehabilitation Option 2
Rehabilitation Option 3
Rehabilitation Option 4
4. TZB Replacement Options (PDF, 1.2 MB)
Replacement Option 1
Replacement Option 2
Replacement Option 3
5. Engineering Criteria (PDF, 782 MB)
Structural Integrity
Vulnerability
Seismicity
Redundancy
Emergency Response
Navigation Clearance
Construction Impacts
Life Span
Compliance with Design Criteria
Summary of Engineering Criteria
6. Environmental Criteria (PDF, 271 KB)
Displacements and Acquisitions
Historical and Archaeological Resources
Parklands and Section 4(f)
Hudson River Ecosystems and Water Resources
Visual Resources
Summary of Environmental Criteria
Other Evaluation Criteria
7. Transportation Criteria (PDF, 67 KB)
Introduction
Transit Ridership
Roadway Congestion
Transit Capacity
Travel Time
Traffic Safety
Other Evaluation Criteria
8. Cost Criteria (PDF, 741 KB)
Introduction
Capital Cost Estimates
Maintenance Cost Estimates
Life Cycle Cost Estimates
9. Conclusion (PDF, 55 KB)
Introduction
Existing TZB Condition, Limits and Vulnerabilities
Future Maintenance Requirements of the Existing TZB
Option Evaluation
Conclusions and Recommendations
Appendices:
Appendix A Property Impacts Drawings (PDF, 95 KB) |
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| Figure A-1 (PDF, 1.5 B) |
Figure A-2 (PDF, 1.8 MB) |
Figure A-3 (PDF, 1.7 MB) |
Figure A-4 (PDF, 1.8 MB) |
| Figure A-5 (PDF, 1.6 MB) |
Figure A-6 (PDF, 1.9 MB) |
Figure A-7 (PDF, 1.8 MB) |
Figure A-8 (PDF, 1.8 MB) |
| Figure A-9 (PDF, 1.7 MB) |
Figure A-10 (PDF, 1.8 MB) |
Figure A-11 (PDF, 1.8 MB) |
Figure A-12 (PDF, 1.7 MB) |
| Figure A-13 (PDF, 1.7 MB) |
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Appendix B Threat and Risk Assessment (PDF, 107 KB) |
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Appendix C Bridge Drawings Index (PDF, 320 KB) |
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| Figure C-1 (PDF, 1 MB) |
Figure C-2 (PDF, 349 KB) |
Figure C-3 (PDF, 1.8 MB) |
Figure C-4 (PDF, 2 MB) |
| Figure C-5 (PDF, 890 KB) |
Figure C-6 (PDF, 366 KB) |
Figure C-7 (PDF, 292 KB) |
Figure C-8 (PDF, 596 KB) |
| Figure C-9 (PDF, 232 KB) |
Figure C-10 (PDF, 179 KB) |
Figure C-11 (PDF, 2 MB) |
Figure C-12 (PDF, 1.7 MB) |
| Figure C-13 (PDF, 1 MB) |
Figure C-14 (PDF, 311 KB) |
Figure C-15 (PDF, 1.1 MB) |
Figure C-16 (PDF, 205 KB) |
| Figure C-17 (PDF, 198 KB) |
Figure C-18 (PDF, 1.2 MB) |
Figure C-19 (PDF, 1 MB) |
Figure C-20 (PDF, 173 KB) |
| Figure C-21 (PDF, 203 KB) |
Figure C-22 (PDF, 1.7 MB) |
Figure C-23 (PDF, 1.7 MB) |
Figure C-24 (PDF, 1.7 MB) |
| Figure C-25 (PDF, 959 KB) |
Figure C-26 (PDF, 210 KB) |
Figure C-27 (PDF, 2.7 MB) |
Figure C-28 (PDF, 853 KB) |
| Figure C-29 (PDF, 1.7 MB) |
Figure C-30 (PDF, 1.7 MB) |
Figure C-31 (PDF, 1.7 MB) |
Figure C-32 (PDF, 1.7 MB) |
| Figure C-33 (PDF, 1.1 MB) |
Figure C-34 (PDF, 164 KB) |
Figure C-35 (PDF, 115 KB) |
Figure C-36 (PDF, 2.9 MB) |
| Figure C-37 (PDF, 980 KB) |
Figure C-38 (PDF, 1 MB) |
Figure C-39 (PDF, 164 KB) |
Figure C-40 (PDF, 120 KB) |
| Figure C-41 (PDF, 320 KB) |
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Appendix
D |
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